Q. Regarding the influence of the solvent on the rate of reaction, solvents having the internal pressure:
✅ Correct Answer: (A)
HIGHER produce products with HIGHER internal pressure
Physical Pharmaceutics 2 MCQs and Notes
Q. Which of the following expression is correct for the determination of shelf life for a first order decomposition?
✅ Correct Answer: (D)
t90 = 0.105/k
Q. Usually, the rate of a chemical reaction may be enhanced by:
✅ Correct Answer: (C)
raising the temperature of the reaction mixture
Q. According to International Pharmaceutical Federation, the recommended overages be limited to the maximum percent of:
✅ Correct Answer: (C)
thirty
Q. Penicillin G is prepared as a salt of procaine penicillin G. Now the rate of decomposition of penicillin G will be:
✅ Correct Answer: (B)
reduced
Q. The expiry date for a tablet is not mentioned on the label. It means that the expiry time in years is:
✅ Correct Answer: (A)
five years
Q. In general, reaction rate constants in neutral pH are comparatively:
✅ Correct Answer: (C)
lower
Q. The specific rate constant (k) determined for aspirin hydrolysis in pH 1.0 buffer at 1 mg/ml concentration is 2.0x10-3 min-1 at 25°C. The shelf life of the product is (in minutes):
✅ Correct Answer: (B)
52
Q. The accelerated stability studies are primarily used to determine:
✅ Correct Answer: (D)
shelf life of the product
Q. The value of t1/2 for second order reaction is
✅ Correct Answer: (A)
1/ak